RSC Advances
·
2015
·Vol. 5
·期 24
·18666-18672
·
IF 3.84
Dongzhi Zhang,Jingjing Liu,Hongyan Chang,Aiming Liu,Bokai Xia
This paper demonstrated a hybrid composite of tin oxide–reduced graphene oxide (rGO) for ppm-level detection of ethanol vapour. A facile and low-cost method of hydrothermal synthesis was used to construct the SnO2–rGO hybrid film on a PCB substrate with coil-like interdigital microelectrodes. The presence of small-sized SnO2 nanocrystals on rGO sheets was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), an X-ray diffractometer (XRD) and Brunauer–Emmett–Teller (BET) measurements. The sensing properties of the SnO2–rGO hybrid film sensor, including the sensitivity, response–recovery times and repeatability, were investigated by exposing it to various concentrations of ethanol gas varying from 1 ppm to 100 ppm at room temperature. As a result, the presented sensor exhibited a low detection limit of 1 ppm at room temperature, as well as a fast response–recovery time and good repeatability, which outstripped that of pure rGO film sensors. Finally, the possible mechanism of ethanol gas-sensing for the above presented sensor was discussed in detail.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Wenqian Yan,Kunmeng Zhu,Yi Cui,Yanhan Li,Tao Dai,Sheng Cui,Xiaodong Shen
A new material of Ag-SnO 2 /rGO aerogel is fabricated by the sol-gel method and freeze-drying technique. The SnO 2 particles are tightly arranged on the rGO sheets to form a p-n heterojunction , and the rGO aerogel possesses abundant pore structures for effective adsorption. Besides, the Ag particles are dispersed on the surface as a catalyst to improve the internal electron mobility, further promoting the gas-sensing performance. To be noted, the Ag-SnO 2 /rGO aerogel can exhibit a response of 2.13 towards 50 ppm NO 2 at RT instead of heating conditions, and shows a cyclic capacitance property of redox. Moreover, the non-linear growth between gas concentration and response is observed, which proves the chemical adsorption that results in the high selectivity.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Longfei Song,Liping Yang,Zhou Wang,Di Liu,Linqu Luo,Xinxu Zhu,Yan Xi,Zaixing Yang,Ning Han,Fengyun Wang,Yunfa Chen
It is a challenge to effectively detect the components of a gas mixture using metal oxide sensors which are easily fabricated and inexpensive. In this work, heterostructured SnO 2 /MO x (i.e. M = Zn, Ga and W) nanotubes (NTs) and nanofibers (NFs) are synthesized via a one-step electrospinning technology and subsequent calcination for use in gas sensors. In specific, compared with pure SnO 2 NTs, SnO 2 /ZnO NTs show an enhanced response to 100 ppm ethanol and acetone, while SnO 2 /Ga 2 O 3 NTs show an obviously higher response to 100 ppm ethanol and SnO 2 /WO 3 NFs show an optimal response to 100 ppm xylene. All these sensors are selective in the presence of typically interfering gases such as formaldehyde, benzene and toluene. As a proof-of-concept, sensor arrays constructed using these three sensors precisely detected the gas mixtures of ethanol, acetone and xylene by means of matrix manipulation, delivering a superior accuracy of <9% deviation for the gas concentration of 10 ppm and 20 ppm and <38% for the concentration of 5 ppm. These results show the possibility of improved selectivity in detecting gas mixtures using heterostructured gas-sensing materials for sensor arrays.
研究领域:
材料科学
·
纳米科技
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传感器技术
·
分析化学
·
功能材料
✓ 已验证
DOI
高影响因子
Nanoscale Research Letters
·
2016
·Vol. 11
·期 1
·1-7
·
IF 2.584
Chen Zeng,Wei Chaochao,Li Shengjun,Diao Chunli,Li Wei,Kong Wenping,Zhang Zhenlong,Zhang Weifeng
SnO 2 nanosheet-structured films were prepared on a fluorine-doped tin oxide (FTO) substrate using ZnO nanosheet as template. The as-prepared SnO 2 nanosheets contained plenty of nano-voids and were generally vertical to the substrate. TiO 2 nanoparticles were homogeneously deposited into the intervals between the SnO 2 nanosheets to prepare a hierarchically structured SnO 2 /TiO 2 hybrid film. The hybrid films were co-sensitized with CdS and CdSe quantum dots. The sensitized solar cells assembled with the SnO 2 /TiO 2 hybrid film showed much higher photoelectricity conversion efficiency than the cells assembled with pure TiO 2 films. The lifetime of photoinduced electron was also investigated through electrochemical impedance spectroscopy, which showed that the SnO 2 /TiO 2 hybrid film electrode is as long as the TiO 2 film electrode.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2017
·
IF 4.339
Miaomiao Liu,Weiqiang Tang,Yisheng Xu,Hongbo Yu,Hongfeng Yin,Shuangliang Zhao,Shenghu Zhou
Pd-SnO 2 heteroaggregate nanocatalysts were synthesized by in-situ transformation of PdSn bimetallic nanoparticles on alumina. The PdSn bimetallic nanoparticles were prepared by co-reduction of Pd and Sn precursors. The obtained PdSn nanoparticles possibly have a core-shell like structure with Pd cores and Sn-rich shells due to the fast reduction of Pd precursors. The Pd-SnO 2 /Al 2 O 3 heteroaggreagte nanocatalysts were synthesized by calcination of PdSn/Al 2 O 3 in air followed by H 2 reduction. Various characterization techniques, such as HRTEM, XRD and XPS, were used to characterize the PdSn and Pd-SnO 2 . The Pd 3 -(SnO 2 ) 1 /Al 2 O 3 heteroaggreagte nanocatalysts with a ratio of Pd/Sn of 3/1 illustrated enhanced catalytic performances for p -nitroacetophenone and p -nitrobenzaldehyde hydrogenations relative to monometallic Pd nanocatalysts. Theoretical calculations using density functional theory suggested that Pd-SnO 2 facilitates the adsorption of reactants in a higher degree than that of products, thus enhancing the catalytic activity even with partial coverage of Pd surfaces with SnO 2 . The blockage effect of SnO 2 on Pd surfaces is speculated to enhance the catalytic selectivity for p -nitroacetophenone and p -nitrobenzaldehyde hydrogenations over Pd-SnO 2 heteroaggregate nanocatalysts.
研究领域:
催化化学
·
材料科学
·
理论计算
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Chen Zhao,Zengyan Wei,Jie Zhang,Peigang He,Xiaoxiao Huang,Xiaoming Duan,Dechang Jia,Yu Zhou
Commercial graphite anodes show limited capacity in lithium-ion batteries, which inhibits the development of high-energy and high-power devices. Although the theoretical capacity of SnO 2 based anodes is three times higher than that of graphite, their practical application is hindered by the poor cycling stability. In this study, we report a ball-milling assisted exfoliation method for the scalable production of delaminated MXene nanosheets , followed by the preparation of 5 nm SnO 2 nanocrystals anchored on MXene nanosheets through a hydrothermal reaction . SnO 2 /MXenes nanocomposites exhibit long cycling life up to 1000 cycles with a high capacity of 904 mA h g −1 , which can be ascribed to the high conductivity of the MXene substrates, and the anchoring effect between SnO 2 nanoparticles and MXene sheets that can prevent crystal aggregation or collapse during cycling.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
DOI
高影响因子
Energy & Environmental Materials
·
2021
·Vol. 4
·期 4
·671-680
·
IF 15.122
Ruxin Guo,Yan Zhao,Yongshang Zhang,Quanrong Deng,Yonglong Shen,Wei Zhang,Guosheng Shao
All-inorganic CsPbBr 3 -based perovskite solar cells (PSCs) have attracted great attention because of their high chemical and thermal stabilities in ambient air. However, the short-circuit current density ( J sc ) of CsPbBr 3 -based PSCs is inadequate under solar illumination because of the wide bandgap, inefficient charge extraction and recombination loss, leading to lower power-conversion efficiencies (PCEs). It is envisaged that in addition to narrowing the bandgap by alloying, J sc of the PSCs could be enhanced by effective improvement of electron transportation, suppression of charge recombination at the interface between the perovskite and electron transporting layer (ETL), and tuning of the space charge field in the device. In this work, Nb-doped SnO 2 films as ETLs in the CsPbBr 3 -based PSCs have been deposited at room temperature by high target utilization sputtering (HiTUS). Through optimizing the Nb doping level alone, the J sc was increased by nearly 19%, from 7.51 to 8.92 mA·cm −2 and the PCE was enhanced by 27% from 6.73% to 8.54%. The overall benefit by replacing the spin-coated SnO 2 with sputtered SnO 2 with Nb doping was up to 39% increase in J sc and 62% increase in PCE. Moreover, the PCE of the optimized device showed negligible degradation over exposure to ambient environment (T ˜ 25 °C, RH˜45%), with 95.4% of the original PCE being maintained after storing the device for 1200 h.
研究领域:
材料科学
·
光伏技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Wenyuan Zhang,Yuanchao Li,Xin Liu,Dongyan Tang,Xin Li,Xi Yuan
One-step antisolvent deposition has been considered as one of the most feasible methods to obtain high-performance perovskite solar cells (PSCs). However, most of the reported high-performance PSCs are based on the toxic anti-solvents, which is a major issue for the potential commercialization of PSCs. SnO 2 has been successfully used as an efficient electron transport layer (ETL) material in PSCs, but the preparation of low-temperature processed crystallization SnO 2 ETLs is still a challenge. In this work, ethyl acetate (EA) as a green antisolvent is introduced into the perovskite crystallization process, resulting in uniform and compact perovskite films with large grain size, reduced grain boundaries, and low defect density. Low-temperature (100 °C) processed SnO 2 ETL provides good interface contact between ETL and perovskite layer, facilitating photoelectron extraction and transport. As a result, a champion power conversion efficiency (PCE) of 17.83% has been achieved. More importantly, unencapsulated PSC retains 84.80% of its original PCE value after storage in atmosphere for 80 days (>1900 h). Apart from great air stability, the final devices also show excellent thermal (100 °C) stability. It is particularly noteworthy that all the preparation and measurement processes were performed under ambient conditions. These findings present a green path towards manufacturing efficient and stable air-processed PSCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 10
·1706276
·
IF 13.325
Liangbin Xiong,Minchao Qin,Cong Chen,Jian Wen,Guang Yang,Yaxiong Guo,Junjie Ma,Qi Zhang,Pingli Qin,Songzhan Li,Guojia Fang
Planar perovskite solar cells (PSCs) based on low-temperature-processed (LTP) SnO 2 have demonstrated excellent photovoltaic properties duo to the high electron mobility, wide bandgap, and suitable band energy alignment of LTP SnO 2 . However, planar PSCs or mesoporous (mp) PSCs based on high-temperature-processed (HTP) SnO 2 show much degraded performance. Here, a new strategy with fully HTP Mg-doped quantum dot SnO 2 as blocking layer (bl) and a quite thin SnO 2 nanoparticle as mp layer are developed. The performances of both planar and mp PSCs has been greatly improved. The use of Mg-SnO 2 in planar PSCs yields a high-stabilized power conversion efficiency (PCE) of close to 17%. The champion of mp cells exhibits hysteresis free and stable performance with a high-stabilized PCE of 19.12%. The inclusion of thin mp SnO 2 in PSCs not only plays a role of an energy bridge, facilitating electrons transfer from perovskite to SnO 2 bl, but also enhances the contact area of SnO 2 with perovskite absorber. Impedance analysis suggests that the thin mp layer is an “active scaffold” selectively collecting electrons from perovskite and can eliminate hysteresis and effectively suppress recombination. This is an inspiring advance toward high-performance PSCs with HTP mp SnO 2 .
研究领域:
材料科学
·
光伏技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Weichen Zeng,Han Zhang,Rui Wu,Luming Liu,Guibai Li,Heng Liang
This study focused on the preparation, characterization, and sulfamethoxazole (SMX) removal performance of the SnO 2 -coated reactive electrochemical membrane (REM). This REM was fabricated by loading SnO 2 on the reduced TiO 2 nanotube arrays (RTNA)-based Ti membrane (TM). Regarding the dopant for SnO 2 , Sb was more effective in boosting the electrocatalytic activity than Bi, and the energy consumption for Sb-SnO 2 -coated REM (TM/RTNA/ATO) was lower than Bi-SnO 2 -coated REM (TM/RTNA/BTO). As for the internal layer, RTNA provided TM/RTNA/ATO with more electroactive surface areas and prolonged the service lifetime. Compared with batch mode, the SMX removal efficiency in flow-through mode was increased up to 8.4-fold. The SMX degradation performances were also affected by fluid velocity, current density, initial SMX concentration, and electrolyte concentration. The synergistic effects of • OH oxidation and direct electron transfer were responsible for the effective removal of SMX. TM/RTNA/ATO was proved to be stable and durable by multi-cycle and accelerated lifetime tests. Its extensive applicability was verified with high removal efficiencies of SMX in the surface water and wastewater effluent. These results demonstrate the promise of TM/RTNA/ATO for water treatment applications.
研究领域:
环境科学
·
电化学工程
·
水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Qingdong Chen,Yong Zhang,Mingcong Tang,Zijian Wang,Dongzhi Zhang
During the process of lithium-ion battery failure, the discharge of hydrogen indicates that the electrolyte has leaked and is being electrolyzed, which is a sign of thermal runaway in lithium batteries . In this work, stannic oxide (SnO 2 ) nanosheets was formed by high-temperature calcination and compounded with Ti 3 C 2 Tx (MXene) in different proportions. The morphology, microstructure and element composition of the material were characterized. The sensing response of MXene-SnO 2 for hydrogen (H 2 ) at the most suitable temperature was explored. The test results show that compared with single SnO 2 , MXene-SnO 2 composite sensor has higher response, shorter response/recovery time, stable repeatability and excellent selectivity. Finally, through density functional theory (DFT) calculation, it may be caused by the microstructure of SnO 2 and MXene synergism in the effect of forming heterostructures between the two materials in response to hydrogen gas .
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Chemistry-An Asian Journal
·
2023
·Vol. 18
·期 10
·e202300085
·
IF 4.1
Weihong Wang,Fanyue Song,Chunfang Du,Yiguo Su
Graphical A sustainable Fe 2 O 3 /SnO 2 composite with fine interfacial feature was prepared and employed for durable peroxymonosulfate activation to eliminate tetracycline. Fe 2 O 3 /SnO 2 displayed the excellent stability and degradation performance due to the synergistic effect between Fe 2 O 3 and SnO 2 . Sustainable Fe 2 O 3 /SnO 2 with fine interfacial feature derived from FeSnO(OH) 5 was prepared and employed for elimination contaminants. The synergistic effect between Fe 2 O 3 and SnO 2 endowed a remarkable degradation performance for tetracycline degradation. Well dispersed SnO 2 can function as fine protective layer to enhance the anchoring of iron ions. In addition, SnO 2 with excellent conductivity can accelerate electron transfer on the surface of Fe 2 O 3 , further activation PMS. Approximately 89.3% of tetracycline (TC) was removed in Fe 2 O 3 /SnO 2 /PMS system, which was higher than alone Fe 2 O 3 /PMS (73.2%) and SnO 2 /PMS (39.7%) systems. The operating parameters were evaluated and studied. Electron paramagnetic resonance (EPR) and quenching tests manifested that 1 O 2 was primary active specie, and ⋅OH, ⋅SO 4 − and ⋅O 2 − were participated in the degradation process. Besides, degradation pathways were proposed by identifying the intermediate products. This work is expected to offer a potential design for construction eco-friendly heterogeneous catalyst toward wastewater treatment.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）